Basic knowledge of flying plant protection UAV

Basic knowledge of flying plant protection UAV

Unmanned aerial vehicle is an unmanned aerial vehicle using radio remote control equipment and its own program control device, including unmanned helicopters, fixed-wing aircraft, multi-rotor aircraft, unmanned airships and unmanned paragliders. Then, let's introduce the basic knowledge of flying plant protection drones for everyone. Welcome to read and browse.

Q: The number of drugs carried by the drone itself is limited. Although the speed is fast and the working area is large, the cost is also high. Compared with manual machinery, which one has advantages? A: The dosage of unmanned aerial vehicles is limited, but the ratio of the stock solution and water we basically use is relatively small, the dosage has not changed, and the concentration of liquid medicine is very high. In addition, the drone has strong wind power and good atomization effect, and the efficiency and effect are naturally higher than those of manual work. Q: So the content of active ingredients in drones is high?

Yes, that's right. For example, a bottle of medicine, a bottle of medicinal hand mixed with five kilograms of water, a bottle of medicinal plane mixed with one kilogram of water.

Q: How much is a plant protection machine? Answer: The electric multi-rotor is 20,000-30,000 to 60,000-70,000, and the oil-driven electric single rotor10-200,000.

Q: The machines sold by the company are very expensive. Can you assemble them yourself?

A: I don't know anything. Can you tell the true parts from the false ones? Same appearance, same trademark, is it genuine? You don't know anything. Even if you assemble it yourself, the plane crashes or there are other problems, you can't solve them yourself.

Q: Are there any precautions in operation? A: To buy a plant protection drone, you need to operate in strict accordance with the requirements. Loose screws may cause the machine to crash.

Before taking off, check the screws in every place, observe the working terrain and determine the flight route. If the spraying operation technology is not good, it may collide with the plane. There are many factors affecting flight altitude, flight speed, airflow, wind speed and so on.

If the liquid in the medicine cabinet shakes, the medicine cabinet suddenly accelerates, and the impact of 10 kg of water inside is very strong, which may be out of control.

Q: What are the inspections for take-off? Answer: Roughly as follows: whether the screws are tightened, whether the motor is loose, whether the rotation is normal, whether the GPS is firmly bonded, whether the medicine cabinet system is normal, whether the battery power is sufficient, and whether the intercom is normal.

Q: Specifically, is there any way to check whether it is normal during the operation?

A: Basically, you can listen, touch and see.

Listen: the noise of motor, the cutting wind of blades, the vibration of loose screws, the abnormal sound of flight, the working sound of water pump.

The second touch: the temperature of the motor is electrically adjusted, the motor is empty, and the looseness of the propeller is loose.

Third look: the stability of flight attitude, the state of water, the indicator light of flight control system, etc. After taking off, hover back and forth to check whether it is abnormal, so as to avoid problems after flying far away.

Q: What are the precautions during the operation?

A: If any abnormality is found in the equipment, it must be grounded immediately and checked carefully until the problem is eliminated.

Q: When adding medicine, can I pour the medicine directly into the medicine box?

A: Never. Liquid medicine is corrosive to the medicine cabinet, so it is not allowed to pour pesticides directly. Some need to add several pesticides. If mixed directly, it may cause chemical reaction, crystallization and nozzle blockage, which will affect the atomization effect of aircraft.

Q: How should I add medicine?

Answer: First, use a graduated bucket, add water, add pesticides, then add water, and then stir well. When adding water, be careful not to splash water on the fuselage arm, which will burn out the electric sound. It is best to use a funnel and wrap it with stockings at the mouth of the funnel to achieve higher filtering effect.

Q: Is there anything to pay attention to when cleaning after work? Answer: To clean the medicine cabinet of the body, be careful not to let the electronic control and avionics of the central board get into the water. Then check whether the screws are fastened. Tripod, arm, motor and paddle are the key points.

Medicine boxes and water pipes must be cleared of pesticide residues, and then water should be injected. Removing the nozzle to clean the nozzle will block the nozzle for a long time.

Q: What are the problems in the plant protection environment?

A: Small plots of land are located in ordinary rural fields. Most plots are 3-8 mu in size. The take-off and landing frequency is too high, and not all the plots are connected. The number of transitions has increased, the field roads are difficult to walk, the aircraft is too heavy, and there are too many supporting things, which greatly reduces the operation efficiency. So be sure to ask about the local farmland before making a decision when taking orders.

Surrounded by a large number of forests, the risk factor of aircraft flight increases. High-voltage lines can be seen everywhere, which has a great influence on the electronic magnetic compass of the aircraft and increases the instability of the aircraft.

Many farmers are curious about airplanes. It is especially dangerous to spray medicine in a new place. No matter taking off or landing, it will have great influence and pressure on flying hands. When the plane is out of control, it will hurt people. When spraying drugs, it is forbidden to enter within 20 meters around the site to ensure a good spraying environment.

Q: What control skills should plant protection flying hands have?

Answer: According to the spraying effect of the aircraft, it is suggested that the flying height of the aircraft should be1-1.5m. If the flying height is too low, not only the spraying range will be small, but also the flying efficiency will be affected. If the flying height is too low, it will probably be mixed with crops, leading to the explosion of the aircraft. Flying too high, the spraying effect is not good, farmers complain, proper spraying height is beneficial to others and self-interest.

Flight speed In principle, the faster the flight speed, the better the spraying effect and the higher the efficiency. In the actual spraying process, for 10kg aircraft, the weight of the fuselage plus batteries and chemicals can reach 25kg, which leads to large inertia and too fast flight speed, and it is difficult to control the flight attitude of the aircraft according to one's own ideas, which leads to the phenomenon of falling off and stopping, and increases the accident rate of the aircraft (it may also be that different flight control types and stopping methods are different). It is suggested that the flight speed of 10kg is 5m/s ... For 5 kg vehicles, the speed can be increased appropriately, but it also depends on the control difficulty, and it is recommended not to exceed 8 m/s.

Visual error When the plane flies too far, the human eye can no longer judge the distance between the plane and other objects. No matter before or after, left or right, two accidents in this operation are related to visual errors. The wrong coordination between the pilot and the ground crew misjudged the remaining distance from the plane to the opposite side, causing the plane to miss the best deceleration opportunity and hang on the tree. The plane stopped at the right time, but it was impossible to judge whether there was an object blocking it in the left and right directions, which caused the plane to hit a branch and crash during translation. These problems all reflect the importance of ground handling, which should give correct signal instructions to the flying hand according to its own judgment. Of course, we can also make a breakthrough in technology, so that the aircraft can automatically judge the timing of stopping and make corresponding actions. At present, there is automatic flight planning technology, but it is not suitable for most farmland.

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